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Agreed; a quick look at the CPU temperature with, say, CoreTemp should verify this.
When removing and replacing the heatsink, you must clean the heatsink and CPU surfaces extremely well and apply fresh, new thermal paste.

how much paste did you use?
you should put just a very small amount in the center of the cpu.
if you did that then recheck to see if your heatsink is set and fastened on right.
also check the fan and make sure it's working.

Possible performance drop due to cleaning fan.

PC gaming performance dropHi, I have a very frustrating issue on my PC. Games performance drops whenever I play it for 10-20 minutes. It varies, e.g. when I play watch dogs, it stutters after playing for 15 minutes. GTA IV lags and stutters after playing for 10 minutes. However there are also games that do not experience...

Performance & Maintenance

Sudden drop in performance by around 60% --- most noticeable in games.I noticed this problem just yesterday when I downloaded the Torchlight 2 demo from Steam and started playing it on max settings.
Lo and behold, I only got 13fps while playing the game :eek: Which is weird because I'm able to hit ~25fps playing Crysis 2 on max (a game with much higher sysytem...

Performance & Maintenance

Why did my processor performance drop?Just yesterday I noticed that my Windows experience index scored my processor at a 2.9 when it has always been way higher than that. It caused me to investigate and download a program called CPUID to see how my processor was actually running, and no matter how hard I tried I couldn't get it to go...

Performance & Maintenance

Sudden, massive drop in RAM performanceHello all!
I've had a fairly powerful Toshiba laptop running Windows 7 Home Premium 64 bit since christmas, but recently decided I'd like a little more power out of it. I followed a fairly routine number of minor adjustments to the appearance, startup programs, and background services, but...

Performance & Maintenance

Performance + WEI Subscore dropI have a trouble with my computer performance.
First time i bought my Notebook, my processor subscore is 6.3
about 4 month past i rerun my WEI and the score become 4.6
What happen to my computer?
Did my processor broken or something?
Now my notebook is reaaaaaly slow...
It takes up to 8...

Performance & Maintenance

Intel can't yet replicate published SSD performance dropIntel can't yet replicate published SSD performance drop
There's been a bit of controversy brewing over whether or not the performance of Intel's SSD X25-M drive degrades as the drive is used due to file fragmentation. PC Perspective has reported that it does; Intel says it can't replicate the...